Rolled metal reinforcement for concrete poles and piles



L A. L. ROBERTS.

ROLLED METAL REINFORCEMENT FOR CONCRETE POLES AND FILES.

a APPLICATION FILED NOV; 25, L919.

Patented July 26, 1921.

k/yj a NVE/LTOR I 2 A llorrzeys UNITED STATES PATENT OFFICE.

ALVIN L. ROBERTS, OF PHILADELPHIA, PENNSYLVANIA.

Specification of Letters Patent.

Patented July 26', 1921.

Application filed. November 25, 1919. Serial No. 340,573.

I '0 all whom it may concern:

Be it known that I, ALVIN L. ROBERTS, a citizen of the United States,and a resident of Philadelphia, in the county of Philadelphia and Stateof Pennsylvania, have invented certain new and useful Improvements inRolled Metal Reinforcements for Concrete Poles and Piles; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use thesame.

This invention relates to a rolled metal reinforcement for concretepoles and piles, and it consists in the details of construction as -willbe more fully explained and pointed out in opposite directions, beingthicker at their juncture with the web than at their free edges. Theribs 3 are made tapering out- Wardly from their junctures with the sidemembers, and are perferably of less width than the side members, theweb, side members and ribs being of substantially the same thickness attheir points of juncture.

This shape is particularly adapted to carry axial loads combined with ahorizontal or side load applied in a direction parallel with the web,hence will be particularly useful for reinforcing piles which support aload at the top and also at the sides.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is

A rolled metal shape composed of a web having parallel faces, sidemembers integral with the edges of the web and tapered from the weboutwardly, being thicker at their points of juncture with the web thanat their free edges and a tapering rib on each side member and in theplane of the web, the web, side members and ribs being of substantiallythe same thickness at their meeting points.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

ALVIN L. ROBERTS. Witnesses:

GEORGE MARX, C. C. HARDING.

